UHV Microdot Feedthroughs
The Microdot coaxial interface, developed for aerospace and instrumentation applications, is a small circular connector, which is sometimes mistaken for the slightly larger SMA coaxial connection. In its most common configuration, the S-50 series (the vacuum microdot feedthroughs offered on this site), it uses a No. 10-32 UNF (.190-32) thread. Male connectors are fitted with a 0.030/.033 diameter pin and jacks have the female mating socket receptacle. It is commonly used in conjunction with high-frequency, low noise, 50-Ohm instrumentation signal lines in accelerometers, and various transducer applications.
Microdot Feedthrough Construction
Accu-Glass Products' Microdot and "between-series" BNC-Microdot coaxial feedthroughs are constructed with grounded shields, where the feedthrough shield and flange are electrically common.
Microdot Feedthrough BNC-Microdot "between-series"
Microdot-BNC feedthroughs offer a simple means of transitioning between BNC and Microdot wired applications, or vise versa. The BNC-Microdot feedthrough is often used in conjunction with crystal sensors to monitor deposition thicknesses of in-vacuum coating applications. Microdot cable assemblies, connectors, and wiring accessories are also offered on this site. Rated for High Vacuum (HV) and Ultrahigh Vacuum (UHV) applications.
UHV Microdot Feedthroughs
The Microdot coaxial interface, developed for aerospace and instrumentation applications, is a small circular connector, which is sometimes mistaken for the slightly larger SMA coaxial connection. In its most common configuration, the S-50 series (the vacuum microdot feedthroughs offered on this site), it uses a No. 10-32 UNF (.190-32) thread. Male connectors are fitted with a 0.030/.033 diameter pin and jacks have the female mating socket receptacle. It is commonly used in conjunction with high-frequency, low noise, 50-Ohm instrumentation signal lines in accelerometers, and various transducer applications.
Microdot Feedthrough Construction
Accu-Glass Products' Microdot and "between-series" BNC-Microdot coaxial feedthroughs are constructed with grounded shields, where the feedthrough shield and flange are electrically common.
Microdot Feedthrough BNC-Microdot "between-series"
Microdot-BNC feedthroughs offer a simple means of transitioning between BNC and Microdot wired applications, or vise versa. The BNC-Microdot feedthrough is often used in conjunction with crystal sensors to monitor deposition thicknesses of in-vacuum coating applications. Microdot cable assemblies, connectors, and wiring accessories are also offered on this site. Rated for High Vacuum (HV) and Ultrahigh Vacuum (UHV) applications.
Warning — SMAs, with .250-36 thread and .035/.037 pin diameter, are often mistaken for Microdot S-93, connectors with .250-32 threads and .030/.033 pins. To avoid possible damage to one or both connector interfaces, these connectors should never be cross-mated. Compare Microdot ® and SMA differences below...
Features
- Microdot® and BNC Coaxial Interfaces
- Single and 'Between Series' Configurations
- Kapton® insulated, 50-Ohm cables
- High temperature rated to 250°C
- UHV compatible construction
- Conflat® and ISO KF compatible mounts
- Air service cables / connectors
- Custom solutions on request
Specifications
| Electrical | |
| Voltage 1, Maximum | 500 VDC |
| Current, Max @ 20°C | 2 A |
| Material | |
| Shell | 304 Ss |
| Pin, Ni-Plated | Ss / Mo |
| Insulation, Ceramic | Alumina |
| Connector, Vacuum 2 | |
| BNC, Ni-Plated | Brass / PEEK |
| Microdot, Au-Plated | Brass / PEEK |
| Cable Insulation | Kapton® |
| Connector, Air | Composite |
| Vacuum Range | |
| UHV, Ultrahigh vacuum | 1x10E-10 Torr |
| HV, High vacuum | 1x10E-8 Torr |
| Temperature Range3 | |
| Feedthrough, Single Ended | 250°C |
| Flange, Conflat® | 450°C |
| Flange, ISO | 150°C |
| Connector / Cable, Air | 165°C |
| Connector / Cable, UHV | 250°C |
| Thermal Gradient, Maximum | 25°C/minute |
| Notes |
- Electrical ratings are maximum test values, with feedthrough's vacuum side at ≤ 1x10-4 Torr. Feedthroughs are intended for instrumentation applications carrying low level signal voltage/current.
- PEEK is a polyether ether ketone thermoplastic.
- Overall assembly ratings must be adjusted to that of its lowest rated component. For cryogenic service, the lowest recommended temperature is -200°C